Schmersal ATEX Safety Interlock Switch , Keyed Actuator Included, Aluminium Housing, IP67, 230V AC, 4A Switch AZ 3350-12ZUEK

Schmersal AZ 3350-12ZUEK Safety Interlock Switch is a rugged, keyed interlock switch engineered for industrial automation safety at 230V AC and 4A contact current rating. Manufactured with a robust aluminium housing, this switch is designed to prevent machine access during hazardous operating conditions by ensuring guards or gates remain securely locked until machinery stops operating.

The device features a keyed actuator which prevents accidental or deliberate operation through simple tools or wires, enhancing operator safety. The compact form factor measuring 114mm (length) x 40.5mm (width) x 38mm (depth) allows installation in constrained environments. Its IP67 ingress protection rating certifies dust-tight sealing and protection against temporary immersion in water, making it suitable for harsh industrial conditions.

Operating reliably in temperature ranges from -30°C to +90°C, the switch is certified to meet EN, IEC, and ISO standards, and carries ATEX hazardous area certification for use in explosive atmospheres. It supports 1 normally open (NO) safety contact and offers four selectable head orientations (90° increments) for versatile application.

Additional benefits include secure screw connections to ensure fixture stability under vibration or shocks and silver contacts to ensure durable conductivity. Typical applications encompass cutting machines, packaging robots, pressurised chambers, and automotive assembly contexts where machine guarding is critical for operational safety.

The switch incorporates a keyed actuator to prevent accidental activation for enhanced safety. Designed with aluminium housing, it offers resistance to impact and corrosion. Suitable for harsh environments with a broad operating temperature range from -30°C to 90°C.

Rated IP67 for protection against dust and temporary water immersion. Features a 4A switch contact current and 230V AC contact voltage for reliable operation. Compact size with dimensions 114mm length, 40.5mm width, and 38mm depth for easy mounting.

The switch can be mounted in 4 different head directions (90° steps) for installation flexibility. Complies with EN, IEC, and ISO standards, and ATEX hazardous area certification. Includes secure screw connections to withstand heavy shocks and vibrations.

Applications include cutting machines, pressurised chambers, packaging robots, and car assembly lines.

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